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3 years ago

How many solutions does 2x+ 2x+ 2=4+2x have

1 answer:

3 0

Let's see!
$2x + 2x + 2 = 4 + 2x\\ 4x + 2 = 4 + 2x\\ 4x - 2x + 2 = 4 + 2x - 2x\\ 2x + 2 = 4\\ 2x + 2 - 2 = 4 - 2\\ 2x + 0 = 2\\ 2x = 2\\ 2x/2 = 2/2\\ x = 1\\$
The answer is B

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During the summer holidays, your brother earns extra money mowing lawns. He mows 6 lawns an hour and has 21 lawns to mow. How lo

Triss [41]

Answer:

His brother will take 3.5 hours or $3\frac{1}{2}$ hours to mow 21 lawns

Step-by-step explanation:

Given:

His brother mows 6 lawns in an hour.

To find the time his brother takes to mow 21 lawns.

Solution:

We will unitary method to find the time he will take to mow 21 lawns.

If 6 lawns are mowed in 1 hour

So, 1 lawn will me mowed in = $\frac{1}{6}$ hours.

Thus 21 lawns will be mowed in = $\frac{1}{6}\times 21=\frac{21}{6}=3.5$ hours.

Thus, his brother will take 3.5 hours or $3\frac{1}{2}$ hours to mow 21 lawns

4 0

3 years ago

The volume of a right circular cone that has a height of 13 m and a base with a diameter of 3.4 m. Round your answer to the near

Mamont248 [21]

Answer:

The volume of right circular cone having height = $13 \ m$ and Diameter = $3.4 \ m$ is $39.4\ cubic\ meter$ .

Step-by-step explanation:

Diagram of the given scenario is shown below.

Given that

Height of a right circular cone is $13 \ m$ .

Diameter of the right circular cone is $3.4 \ m$ .

To find: The volume of a right circular cone.

So, From the question,

$Height = \ 13 \ m\\diameter = 3.4\ m$

$Radius = \frac{diameter}{2}= \frac{3.4}{2}$

⇒ $Radius = 1.7\ m$

Now

Volume of right circular cone = $\frac{1}{3}\pi r^{2}h$

$=\frac{1}{3}\times\frac{22}{7} \times (1.7)^{2}\times 13$

= $\frac{826.54}{21}$

$= 39.4\ cubic\ meter$ .

Therefore,

The volume of right circular cone having height = $13 \ m$ and Diameter = $3.4 \ m$ is $39.4\ cubic\ meter$ .

8 0

3 years ago

Oceanside Bike Rental Shop charges 12 dollars plus 7 dollars an hour for renting a bike. Sandy paid 40

alexgriva [62]

x = # of hours the bike was rented.

$40 = $12 + $7x

Subtract $12 from both sides.

$28 = $7x

Divide both sides by $7

4 = x

Sandy rented the bike for 4 hours.

8 0

3 years ago

You go to dinner and decide to leave a 15% tip for your server you had 45 when you came to the restaurant. How much money would

Zepler [3.9K]

Answer:

$24.3

Step-by-step explanation:

Tip:

15% of 18 = 0.15 x 18 = 2.7

Cost of Dinner:

Tip + Cost of meal = total price

2.7 + 18 = 20.7

Money Remaining:

Starting value - Cost of Dinner = Amount remaining

45 - 20.7 = 24.3

-Chetan K

5 0

2 years ago

Read 2 more answers

5x=29x what is the value of x

Studentka2010 [4]

Answer:

x = 0

Step-by-step explanation:

5x=29x

Subtract 5x from each side

5x-5x=29x-5x

0 = 24x

Divide each side by 24

0/24 =24x/24

0 = x

8 0

3 years ago